refactor(V0.2): 详情页精简 + 列表行样式调整

- 任务详情: 移除底部「拷贝到其他项目 / 删除任务」按钮 (⋯ 菜单仍保留入口), 清理相关死代码
- 列表子任务: 改为与普通任务同构的两行布局 (标题 + 左侧状态点/状态文字, 字体略小)
- 列表任务卡片第二行不再显示看板分组标签

src/pages/task/TaskDetail.jsx

@@ -1,10 +1,9 @@
 import { useEffect, useState } from 'react'
-import { ActionSheet, Dialog, Popup, Toast } from 'antd-mobile'
+import { ActionSheet, Popup, Toast } from 'antd-mobile'
 import { taskApi } from '../../api/task.js'
 import { STATUS_OPTIONS, STATUS_LABEL } from './date.js'
 import UserPicker from '../../components/task/UserPicker.jsx'
 import StatusDot from '../../components/task/StatusDot.jsx'
-import CopyTaskPopup from '../../components/task/CopyTaskPopup.jsx'
 import useKeyboardInset from '../../hooks/useKeyboardInset.js'
 import useOverlayBack from '../../hooks/useOverlayBack.js'
 
@@ -25,7 +24,6 @@ export default function TaskDetail({ task, columns, members, tasks, onClose, onS
   const [newSub, setNewSub] = useState('')
   const [saving, setSaving] = useState(false)
   const [picker, setPicker] = useState(null)   // 'assignee' | 'members'
-  const [copyOpen, setCopyOpen] = useState(false)
   const [parentPick, setParentPick] = useState(false) // 转为子任务: 选择父任务
 
   // 键盘弹出插入量: 抬升弹层内容, 输入框不被遮挡
@@ -132,25 +130,7 @@ export default function TaskDetail({ task, columns, members, tasks, onClose, onS
     }
   }
 
-  async function removeTask() {
-    const ok = await Dialog.confirm({
-      content: subs.length
-        ? `删除该任务？将一并删除 ${subs.length} 条子任务。`
-        : '删除该任务？',
-      confirmText: '删除',
-    })
-    if (!ok) return
-    try {
-      await taskApi.remove(task.id)
-      Toast.show({ content: '已删除' })
-      onSaved?.()
-    } catch (e) {
-      Toast.show({ content: e.message })
-    }
-  }
-
-  return (
-    <Popup
+  return (    <Popup
       visible
       onMaskClick={onClose}
       position="bottom"
@@ -278,10 +258,6 @@ export default function TaskDetail({ task, columns, members, tasks, onClose, onS
       </div>
 
       <div className="btn-primary" onClick={save}>{saving ? '保存中…' : '保存'}</div>
-      <div className="btn-ghost" onClick={() => setCopyOpen(true)}>拷贝到其他项目</div>
-      <div className="btn-danger" onClick={removeTask}>
-        删除任务{subs.length > 0 && <span className="del-hint">（将一并删除 {subs.length} 条子任务）</span>}
-      </div>
 
       <UserPicker
         visible={picker === 'assignee'}
@@ -301,13 +277,6 @@ export default function TaskDetail({ task, columns, members, tasks, onClose, onS
         onConfirm={(ids) => setForm((p) => ({ ...p, memberIds: Array.isArray(ids) ? ids : [] }))}
       />
 
-      <CopyTaskPopup
-        task={task}
-        visible={copyOpen}
-        onClose={() => setCopyOpen(false)}
-        onDone={onChanged}
-      />
-
       {/* 转为子任务: 从项目内顶层任务中选父任务 */}
       <Popup
         visible={parentPick}